Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
vai cua » dai cua, hai cua, lai cua
luc va » tuc va, loc va
vi cua » di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. thien van cau ((luc va) OR (duc va)) thanh ((vi cua) OR (vai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. thien van cau ((luc va) or (duc va)) thanh ((vi cua) OR (vai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. thien van cau ((luc va) or (duc va)) thanh ((vi cua) OR (vai cua)) tre*.